CN102472661B - A system and method for measuring a resonance frequency of a tube - Google Patents
A system and method for measuring a resonance frequency of a tube Download PDFInfo
- Publication number
- CN102472661B CN102472661B CN201080031564.1A CN201080031564A CN102472661B CN 102472661 B CN102472661 B CN 102472661B CN 201080031564 A CN201080031564 A CN 201080031564A CN 102472661 B CN102472661 B CN 102472661B
- Authority
- CN
- China
- Prior art keywords
- pipe
- frequency
- oscillation frequency
- time delay
- resonant frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H13/00—Measuring resonant frequency
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/02007—Evaluating blood vessel condition, e.g. elasticity, compliance
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02133—Measuring pressure in heart or blood vessels by using induced vibration of the blood vessel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0891—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of blood vessels
Abstract
The invention proposes a system for measuring a resonance frequency of a tube. The system comprises: - an oscillating unit (21) for oscillating the tube at a plurality of oscillation frequencies, respectively; - a detecting unit (22) for detecting a time delay of transmitting a pressure pulse from a first position to a second position in the tube when the tube is oscillated at each oscillation frequency, wherein, when the tube is oscillated at each oscillation frequency in a specific oscillation frequency range of the plurality of oscillation frequencies, the detecting unit (22) detects a variation of the time delay - a determining unit (23) for determining a maximal variation of the time delay when the tube is oscillated at the oscillation frequencies in the specific oscillation frequency range; ; and - an indicating unit (24) for indicating an oscillation frequency corresponding to the maximal variation of the time delay, being a resonance frequency of the tube.
Description
Technical field
The present invention relates to the system and method for the characteristic for measuring tube, particularly, it relates to the system and method for the resonant frequency for measuring tube.
Background technology
In human body or animal bodies, the most noticeable flexible pipe is blood vessel and air flue.Air flue can comprise tracheae, main bronchus and little bronchiole etc.In area of medical diagnostics, know that pipe is useful to the response stimulated.Stimulation can be such as systaltic stimulation naturally, or artificial stimulation.Described artificial stimulation can be the Pressure stimulation from health outside.Pipe can be used to pathological diagnosis to the response stimulated or be used to optimize treatment process.
Pipe can produce resonance to the response stimulated.When outside stimulus cause the ceiling capacity in pipe to store and the peak swing causing tube wall to move time resonate.The resonance of pipe is relevant with the motion caused by the stimulation putting on pipe.The frequency that resonance occurs depends primarily on the material behavior etc. of pipe.In order to the object diagnosed, implement the measurement that the pipe caused by stimulation is moved.
Such as, arterial stiffness measures the time delay usually entering another location based on measurement pressure pulse along artery from a position row.Described time delay depends on the speed that pressure pulse is advanced in the artery, and described time delay is relevant to the elasticity of arterial wall.Current, the method detecting the resonant frequency of artery is the fragment of taking-up animal artery, applying pressure pulse causes observing to stimulate described arterial segments and to measure the amplitude that the tube wall of resonance moves.If it should be noted that arterial segments is resonance, then the frequency corresponding to described resonance is the resonant frequency of artery.But current method is not also suitable for clinical practice, because artery is arranged in human body or animal body, therefore in General Clinical practice, people can not see whether artery resonates, and this makes to be difficult to the resonant frequency based on current method determination artery.
Another example is measure the characteristic of air flue (such as tracheae, main bronchus or little bronchiole), thus measure the resonant frequency of air flue, cough to assist by optimizing therapeutic frequency during box lunch use vibration/percussion therapy, or contribute to diagnosis or disease control.Resonant frequency is help patient to strengthen the optimum oscillation frequency that sticky productive cough goes out.
Current, use Forced Oscillations Technology (FOT) and impulse oscillometry (IOS) to measure to change in response to the periodic pressure that caused by the pressure putting on pulmonary system and the air pressure of pressure pulse and air-flow, to diagnose pathology at mouth portion.Based on FOT and IOS, when institute's applied pressure pulse with do not have to determine resonant frequency during phase delay between the response detected by mouth.But due to the intrinsic inexactness of system, the resonant frequency determined by FOT or IOS is restricted to low frequency.
In addition, gluing productive cough and go out, usually, instructing patient to cough in a different manner, thus first sticky phlegm being moved to main bronchus from less bronchiole, then sticky phlegm being moved to tracheae from main bronchus to improve lung, the most sticky productive cough goes out.Therefore, need to detect resonance for less bronchiole, main bronchus and tracheae respectively.Especially, some diseases only has impact to a part for whole pulmonary system.Such as, COPD (chronic obstructive pulmonary disease) mainly has impact to little bronchiole, and it demonstrates and identifies that the resonance of pulmonary system compared with small airway is to diagnose the necessity of COPD independently.But, current, based on FOT or IOS, be difficult to distinguish respectively the resonance of the little bronchiole of pulmonary system, main bronchus and tracheae.
Summary of the invention
One object of the present invention is the system proposing a kind of resonant frequency for accurate measuring tube.
For a system for the resonant frequency of measuring tube, it comprises:
-oscillating unit, it is for vibrating described pipe with multiple oscillation frequency respectively;
-detecting unit, it is for detecting when described pipe is to be transferred to the time delay of the second place from the primary importance described pipe by pressure pulse during each oscillation frequency, wherein, when described pipe is with each oscillation frequency in the specific surge frequency range of described multiple oscillation frequency, the change that described detecting unit postpones detection time;
-determining unit, it is for determining when described pipe is with the maximum change of time delay during oscillation frequency in described specific surge frequency range; And
-indicating member, it is for changing with the described maximum of described time delay the described resonant frequency that corresponding oscillation frequency is designated as described pipe.
It is advantageous that described system can measure the resonant frequency of described pipe more accurately.
In an embodiment, described system comprises comparing unit, and this comparing unit is used for described resonant frequency and predefined frequency meter to compare one/mono-group characteristic determining described pipe.
It is advantageous that can based on one/mono-group more accurate characteristic of pipe described in described accurate resonant frequency measuring.
In another embodiment, system comprises computing unit, and this computing unit is used for one/mono-group characteristic calculating described pipe based on described resonant frequency.
It is advantageous that one/mono-group more accurate characteristic that can calculate described pipe based on described accurate resonant frequency.
In another embodiment, described system comprises auxiliary unit, and described auxiliary unit is coughed for assisting based on described resonant frequency when described pipe is air flue.
It is advantageous that and can more effectively realize cough based on described accurate resonant frequency.
The present invention also proposes a kind of system of at least one resonant frequency for measuring tube, and described system comprises:
-oscillating unit, it is for vibrating described pipe with multiple oscillation frequency respectively,
-detecting unit, it is for detecting when described pipe is to be transferred to the time delay of the second place from the primary importance described pipe by pressure pulse during each oscillation frequency, and
-indicating member, it is for exporting chart to reflect the correlativity between described multiple oscillation frequency and described time delay, wherein, in at least one specific surge frequency range of described multiple oscillation frequency, each oscillation frequency corresponds to the change of time delay, further, at least one specific surge frequency range described, corresponding oscillation frequency is changed at least one resonant frequency described in described pipe with the maximum of time delay.
It is advantageous that described system can generate chart more accurately to demonstrate at least one resonant frequency of described pipe.
The present invention also proposes the method corresponding with the system of the resonant frequency of measuring tube.
Detailed explanation of the present invention and other aspects will be provided below.
Accompanying drawing explanation
From the following detailed description considered by reference to the accompanying drawings, above and other object of the present invention and feature will become more obvious, in the accompanying drawings:
Figure 1A describes not by the xsect of pipe vibrated;
Figure 1B describes just by the cyclical variation of pipe from minimum diameter to maximum gauge of vibrating;
Fig. 2 schematically shows according to the system of embodiments of the invention for the resonant frequency of measuring tube;
Fig. 3 is the chart of the correlativity illustrated between oscillation frequency and amplitude;
Fig. 4 schematically shows the correlativity between time delay and oscillation frequency;
Fig. 5 schematically shows the example of the resonant frequency of measuring tube;
Fig. 6 schematically shows another example of the resonant frequency of measuring tube;
Fig. 7 schematically depict according to the method for embodiments of the invention for the resonant frequency of measuring tube.
In whole accompanying drawing, identical Reference numeral is used to indicate similar part.
Embodiment
The characteristic of content (such as gas/liquid) in the characteristic of the speed that pressure pulse transmits in pipe and tube wall, pipe, the diameter of pipe and the outside oscillation pressure causing the diameter of pipe to change relevant.
Such as, in the compliance of the speed transmitted in the blood vessel of pressure pulse and vascular wall, blood vessel, the density of blood, the diameter of blood vessel and outside oscillation pressure are relevant.Outside oscillation pressure causes vascular wall with positive divergence (divergence) and the vibration of negative divergence, thus makes the diameter of vascular wall increase with circulation pattern and reduce.In blood vessel pressure pulse velocity variations based on blood vessel diameter change and occur.In blood vessel, the velocity variations of pressure pulse causes pressure pulse along blood vessel from a location transmission to the time variations of another location.Outside oscillation pressure is transferred to vascular wall and blood by covering the skin of the correspondence of vascular wall.
In another example, the density of gas comprised in the diameter of speed and the pipe of transmission pressure pulse in the air flue of lung, air flue, the compliance of air flue and to put on the outside oscillation pressure of air flue relevant.When air flue vibrates at oscillation pressure, air flue is with circulation pattern enlargement and contraction, and the diameter of air flue also changes with circulation pattern.In air flue pressure pulse speed based on diameter change and change, and velocity variations causes pressure pulse along air flue from a location transmission to the time variations of another location.
Figure 1A describes not by the xsect of pipe vibrated, and Figure 1B describes just by the cyclical variation of pipe from minimum diameter to maximum gauge of vibrating.The diameter cyclical variation of pipe, this causes the speed period of pressure pulse in pipe to change.As shown in Figure 1B, when the diameter of pipe is maximal value, the speed of transmission pressure pulse is maximal value, and when the diameter of pipe is minimum value, the speed of transmission pressure pulse is minimum value.The maximum change of speed is caused by oscillation pressure, and the frequency of corresponding oscillation pressure is the resonant frequency of pipe.
Time delay is time pressure pulse being transferred to the second place along pipe from primary importance, and the velocity correlation of pressure pulse in this time delay and pipe.If the velocity variations of pressure pulse in pipe, then this time delay also changes.If velocity variations is maximal value, then time delay be changed to maximal value, therefore the maximum change of time delay also indicates the resonance of pipe.
Fig. 2 schematically shows according to the system of embodiments of the invention for the resonant frequency of measuring tube.System 20 comprises:
-oscillating unit 21, it is for vibrating described pipe with multiple oscillation frequency respectively;
-detecting unit 22, it is for detecting when described pipe is to be transferred to the time delay of the second place from the primary importance described pipe by pressure pulse during each oscillation frequency, wherein, when described pipe is with each oscillation frequency in the specific surge frequency range of described multiple oscillation frequency, the change that described detecting unit postpones detection time;
-determining unit 23, it is for determining when described pipe is with the maximum change of time delay during oscillation frequency in described specific surge frequency range, and
-indicating member 24, it is for changing with the described maximum of time delay the described resonant frequency that corresponding oscillation frequency is designated as described pipe.
Described pipe is the flexible pipe of the air flue of such as blood vessel, pulmonary system.Described air flue can be tracheae, main bronchus or little bronchiole.Based on oscillation frequency, tube wall is vibrated.Described pipe comprises the content of such as gas or liquid.When described pipe is air flue, pressure pulse can be caused by the stimulation provided by stimulating unit (not shown in Fig. 2).When described pipe is blood vessel, pressure pulse can be caused by heart contraction.
After reception command signal (being shown in Figure 2 for IS), oscillating unit 21 starts to generate multiple oscillation pressure with the described pipe that vibrates successively, and each oscillation pressure corresponds to different oscillation frequency.Can by user (doctor, patient etc.) input instruction signal.
Multiple oscillation frequency is in predefined frequency range, and described predefined frequency range can be provided by the fabricator of system 20 or user (doctor, patient etc.).If described predefined frequency range is not stored in system 20, user can input the oscillation frequency of pre-defined scope with the described pipe that vibrates respectively to oscillating unit 20.If predefined frequency range is stored in system 20, user and/or oscillating unit 21 can select oscillation frequency with the described pipe that vibrates respectively from predefined frequency range.Predefined surge frequency range can be the scope of 1Hz ~ 500Hz, the scope etc. of 1Hz to 100Hz.
The primary importance of pipe can be the position along the transmission direction of pressure pulse in pipe, and the second place of pipe is the another location from the primary importance of pipe along the transmission direction of pressure pulse.The time that pressure pulse arrives primary importance was represented by the first time of arrival (hereinafter referred to as FAT), and the time that pressure pulse arrives the second place was represented by the second time of arrival (hereinafter referred to as SAT).Detecting unit 22 comprises two sensors collecting the FAT of primary importance and the SAT of the second place respectively.Described sensor can be microphone.
As an alternative, if described pipe is air flue, and described pressure pulse is caused by stimulating unit, then the primary importance of pipe can be the position at stimulating unit place, and the second place of pipe is the another location along the transmission direction of pressure pulse in pipe.Detecting unit 22 comprises the sensor of the SAT collecting the second place, and the FAT of primary importance is almost 0.Described sensor can be microphone.
Detecting unit 22 is intended to calculate based on the FAT of primary importance and the SAT of the second place time delay (mistiming) pressure pulse being transferred to the second place from primary importance.
Indicating member 24 is intended to instructions resonant frequency (being shown in Figure 2 for RF) such as character information, chart, light, sound, warnings.Indicating member 24 also can be intended to instruction and be stored in memory by resonant frequency, and described storer can in system 20 or in external unit.
For medical diagnostic applications, system 20 can comprise the comparing unit (not shown in Fig. 2) of one/mono-group of characteristic for comparing resonant frequency and predefined resonant frequency table to determine pipe.Described characteristic can be the mechanical property of blood vessel or pulmonary system, the elasticity of such as tube wall.Described predefined frequency meter can comprise one group of resonant frequency, and wherein each resonant frequency can correspond to the state of human body or animal body, and each resonant frequency also can correspond to one or one group of characteristic of described pipe.
For another medical diagnostic applications, system 20 can comprise the computing unit (not shown in Fig. 2) of one/mono-group of characteristic for calculating pipe based on resonant frequency.Correlativity between the resonant frequency of blood vessel and the elasticity of blood vessel can be represented by following known equation:
In this equation, f represents resonant frequency, and E represents the elasticity of vascular wall, and ρ represents the density of blood in blood vessel, and R is the inside radius of blood vessel.Based on equation and resonant frequency, the elasticity of blood vessel can be calculated, if this is that then described resonant frequency is directly related with the elasticity of vascular wall owing to supposing that blood has the density of relative constancy.
For other medical diagnostic applications, when described pipe is air flue, system 20 can also comprise the auxiliary unit for assisting pulmonary system to cough based on resonant frequency.Such as, resonant frequency is coughed to contribute to pulmonary system for the bronchus of the pulmonary system that vibrates.Auxiliary unit can also be combined with PEP (PEP) therapeutic equipment.
Described multiple oscillation frequency can comprise one group of specific surge frequency range.In the specific surge frequency range of this group, when each oscillation frequency is used to vibrate described pipe, the time delay that pressure pulse is transferred to the second place from the primary importance pipe is changed.Include the maximum change of time delay and this maximum change corresponds to the oscillation frequency in each specific hunting range.Detecting unit 22 can be intended to the change postponed the detection time when each oscillation frequency in this group surge frequency range is used to vibrate described pipe.Determining unit 23 can be intended to the maximum change determining time delay when often organizing the oscillation frequency in specific surge frequency range and being used to vibrate described pipe, thus determines the maximum change of the one group time delay corresponding with the specific surge frequency range of this group respectively.Indicating member 24 can be intended to change with the maximum of each time delay the resonant frequency that corresponding oscillation frequency is designated as described pipe, thus the resonant frequency of instruction one group of pipe.
As an alternative, this group resonant frequency and predefined resonant frequency table can be compared one/mono-group characteristic determining pipe by comparing unit.Computing unit can calculate one/mono-group characteristic of pipe based on this group resonant frequency.Auxiliary unit may be used for assisting pulmonary system to cough based on this group resonant frequency, such as, selects the resonant frequency corresponding with maximum in the maximum change of time delay to assist and coughs.
Such as the resonant frequency of tracheae, main bronchus and little bronchiolar air flue is different.Based on of the present invention mentioned embodiment, the resonant frequency of different air flue can be measured respectively.Such as, tracheae, main bronchus and little bronchiolar resonant frequency can be applied separately and cough with auxiliary in tracheae, main bronchus and little bronchiole.
Fig. 3 is for illustrating the chart of the correlativity between oscillation frequency (being depicted as F) and amplitude (being depicted as A).In figure 3, multiple oscillation frequency is applied separately on three pipes, and causes three groups of maximum (peak value) amplitude of oscillations for these three pipes.The oscillation frequency with peak swing is resonant frequency.The peak swing of tube wall causes the maximum change of the speed of pressure pulse in pipe, and therefore causes maximum change pressure pulse being transferred to the time delay of the second place from the primary importance pipe.
In another embodiment, the indicating member (24) of system 20 is also for exporting chart to reflect the correlativity between multiple oscillation frequency and time delay, wherein, in at least one specific surge frequency range of multiple oscillation frequency, each oscillation frequency corresponds to the change of time delay, further, at least one specific surge frequency range described, the oscillation frequency corresponded to the maximum change of time delay is at least one resonant frequency of described pipe.
Fig. 4 schematically shows the correlativity between time delay (being depicted as TD) and oscillation frequency (being depicted as F).Each resonant frequency corresponds to the maximum change of time delay, such as, Fr1 corresponds to the maximum change of the time delay in specific surge frequency range Fr11 to Fr12, and Fr2 corresponds to the maximum change of the time delay in another specific surge frequency range Fr21 to Fr22.In the diagram, maximum one is changed to corresponding to the maximum of Fr1.The unit of oscillation frequency is Hz, and the unit of time delay is ms (millisecond).When described pipe is with oscillation frequency, detects time delay corresponding to several times and postpone whether to change with the supervision time.
Fig. 5 schematically shows the example of the resonant frequency of measuring tube.Pipe 50 is stimulated by stimulation pressure (being shown in Figure 5 for EP) to cause pressure pulse to transmit in pipe 50.Oscillation pressure (being shown in Figure 5 for OP) is applied in pipe 50 and vibrates to cause pipe 50.Sensor S1 is for collecting the FAT of primary importance, and sensor S2 is for collecting the SAT of the second place, thus obtains the time delay between primary importance and the second place based on FAT and SAT.There is provided stimulation pressure by stimulating unit, and provide oscillation pressure by oscillating unit 21.
Fig. 6 schematically shows another example of the resonant frequency of measuring tube.In this embodiment, give pulmonary system, this pulmonary system comprises some air flues, such as tracheae 61, main bronchus 62 and little bronchiole 63.Pressure (being shown in Figure 6 for EP) is stimulated to be applied in tracheae 61 by mouth (not shown in figure 6), it causes pressure pulse to be transferred to little bronchiole from tracheae via main bronchus, and applies oscillation pressure (being shown in Figure 6 for OP) and vibrate to cause air flue.The resonant frequency of tracheae 61, main bronchus 62 and bronchiole 63 can be measured separately, and wherein, sensor S1 and sensor S2 is used to the resonant frequency measuring tracheae 61, and sensor S2 and sensor S3 is used to the resonant frequency measuring main bronchus 62.There is provided stimulation pressure by stimulating unit, and provide oscillation pressure by oscillating unit 21.The state (in expiration state or not in expiration state) of pulmonary system can affect the transmission of pressure pulse, thus pulmonary system is remained on the one short period of same state (such as the state of abundant air-breathing) to complete the measurement of the resonant frequency to pulmonary system.System 20 can also comprise to be carried out measuring to guarantee to measure the equipment of all air flues at different lung volumes for guaranteeing.
Fig. 7 schematically depict the method for the resonant frequency of measuring tube.Said method comprising the steps of.
Step 71 is for vibrating described pipe with multiple oscillation frequency respectively.Described oscillation frequency is in predefined frequency range, and described predefined frequency range by the fabricator of system 20 or can be provided by user.
Step 72 for detecting when described pipe is to be transferred to the time delay of the second place from the primary importance described pipe by pressure pulse during each oscillation frequency in the specific surge frequency range of described multiple oscillation frequency, the change that detecting step 72 postpones detection time.When described pipe is blood vessel, described pressure pulse can be caused by heart contraction.
Step 73 is for determining when described pipe is with the maximum change of time delay during oscillation frequency in described specific surge frequency range.
Step 74 is for changing with the described maximum of time delay the described resonant frequency that corresponding oscillation frequency is designated as described pipe.
Instruction step 74 is intended to instruction resonant frequencies such as character information, chart, light, sound, warnings.Instruction step 74 can also be intended to instruction and be stored in memory by resonant frequency.
For medical diagnostic applications, described method can comprise the step of the one/mono-group of characteristic comparing resonant frequency and predefined resonant frequency table to determine pipe.
For another medical diagnostic applications, described method can comprise the step of the one/mono-group of characteristic calculating pipe based on resonant frequency.
For other medical diagnostic applications, when described pipe is air flue, described method can also comprise the step of assisting pulmonary system to cough based on resonant frequency.
Described multiple oscillation frequency can comprise one group of specific surge frequency range.In the specific surge frequency range of this group, when each oscillation frequency is used to vibrate described pipe, the time delay that pressure pulse is transferred to the second place from the primary importance pipe is changed.Include the maximum change of time delay and this maximum change corresponds to the oscillation frequency in each specific hunting range.Detecting step 72 can be intended to the change postponed the detection time when each oscillation frequency in this group surge frequency range is used to vibrate described pipe.Determining step 73 can be intended to the maximum change postponed the detection time when often organizing the oscillation frequency in specific surge frequency range and being used to vibrate described pipe, therefore determines the maximum change of the one group time delay corresponding with the specific surge frequency range of this group respectively.Instruction step 74 can be intended to change with the maximum of each time delay the resonant frequency that corresponding oscillation frequency is designated as pipe, and then indicates the resonant frequency of one group of pipe.
As an alternative, this group resonant frequency and predefined resonant frequency table can be compared one/mono-group characteristic determining pipe by comparison step.Calculation procedure can calculate one/mono-group characteristic of pipe based on this group resonant frequency.Additional step may be used for assisting pulmonary system to cough based on this group resonant frequency, such as, selects the resonant frequency corresponding with maximum in the maximum change of time delay to assist and coughs.
In another embodiment, instruction step 74 is also intended to export chart to reflect the correlativity between multiple oscillation frequency and time delay, wherein, in at least one specific surge frequency range of multiple oscillation frequency, each oscillation frequency is corresponding with the change of time delay, and at least one specific surge frequency range described, change with the maximum of time delay at least one resonant frequency that corresponding oscillation frequency is described pipe.
Computer program is used in the described method of the resonant frequency of measuring tube.
It should be noted, above-described embodiment illustrates the present invention and unrestricted the present invention, and those skilled in the art can design alternate embodiment without departing from the scope of the appended claims.In detail in the claims, any Reference numeral being placed in bracket should not be interpreted as limitations on claims.Word " comprises " not getting rid of and there is element unlisted in claim or instructions or step.Word "a" or "an" before element is not got rid of and be there is multiple such element.The present invention can be realized by the unit of hardware and the unit of computing machine of programming in advance comprising some different elements.In the system claims listing some unit, can embody in these unit by hardware or software and identical entry some.The use of word first, second, third, etc. does not indicate any sequence.To be title these word explanations.
Claims (15)
1., for a system for the resonant frequency of measuring tube, described system comprises:
-oscillating unit (21), it for managing respectively described in multiple oscillation frequency;
-detecting unit (22), it is for detecting when described pipe is to be transferred to the time delay of the second place from the primary importance described pipe by pressure pulse during each oscillation frequency, wherein, when described pipe is with each oscillation frequency in the specific surge frequency range of described multiple oscillation frequency, described detecting unit detects the change of described time delay;
-determining unit (23), it is for determining when described pipe is with the maximum change of described time delay during described oscillation frequency in described specific surge frequency range, and
-indicating member (24), it is for changing with the described maximum of described time delay the resonant frequency that corresponding oscillation frequency is designated as described pipe.
2. the system as claimed in claim 1, also comprises comparing unit, and described comparing unit is used for described resonant frequency and predefined frequency meter to compare one/mono-group characteristic determining described pipe.
3. the system as claimed in claim 1, also comprises computing unit, and described computing unit is used for one/mono-group characteristic calculating described pipe based on described resonant frequency.
4. the system as claimed in claim 1, also comprises auxiliary unit, and described auxiliary unit is coughed for assisting based on described resonant frequency when described pipe is air flue.
5. the system as claimed in claim 1, also comprises stimulating unit, described stimulating unit when described pipe is air flue for stimulating described pipe to generate described pressure pulse.
6. the system as claimed in claim 1, wherein, when described pipe is blood vessel, generates described pressure pulse by stimulating described pipe based on heart contraction.
7. the system as claimed in claim 1, wherein, described indicating member (24) is intended to indicate described resonant frequency with character information, chart, light or sound, or is stored in memory by described resonant frequency.
8. the system as claimed in claim 1, wherein, described indicating member (24) is intended to warn the described resonant frequency of instruction.
9. a method for the resonant frequency of measuring tube, said method comprising the steps of:
-respectively with multiple oscillation frequency (71) described pipe;
-detect (72) when described pipe is to be transferred to the time delay of the second place from the primary importance described pipe by pressure pulse during each oscillation frequency, wherein, when described pipe is with each oscillation frequency in the specific surge frequency range of described multiple oscillation frequency, described detecting step (72) detects the change of described time delay;
-determine that (73) are when described pipe is with the maximum change of described time delay during described oscillation frequency in described specific surge frequency range; And
-indicate (74) for the resonant frequency of described pipe by changing corresponding oscillation frequency with described time delay described maximum.
10. method as claimed in claim 9, also comprises the step of the one/mono-group of characteristic comparing described resonant frequency and predefined frequency meter to determine described pipe.
11. methods as claimed in claim 9, also comprise the step of the one/mono-group of characteristic calculating described pipe based on described resonant frequency.
12. methods as claimed in claim 9, are also included in when described pipe is air flue and stimulate described pipe to generate the step of described pressure pulse.
13. methods as claimed in claim 9, wherein, when described pipe is blood vessel, generate described pressure pulse by stimulating described pipe based on heart contraction.
14. 1 kinds of systems at least one resonant frequency of measuring tube, described system comprises:
-oscillating unit (21), it is for vibrating described pipe with multiple oscillation frequency respectively;
-detecting unit (22), it is for detecting when described pipe is to be transferred to the time delay of the second place from the primary importance described pipe by pressure pulse during each oscillation frequency; And
-indicating member (24), it is for exporting chart to reflect the correlativity between described multiple oscillation frequency and described time delay, wherein, in at least one specific surge frequency range of described multiple oscillation frequency, each oscillation frequency corresponds to the change of described time delay, and, in at least one specific surge frequency range described, change corresponding oscillation frequency with described time delay maximum and be designated as at least one resonant frequency described in described pipe by described indicating member.
The method of at least one resonant frequency of 15. 1 kinds of measuring tubes, described method comprises:
-respectively with multiple oscillation frequency (71) described pipe;
-detect (72) when described pipe is to be transferred to the time delay of the second place from the primary importance described pipe by pressure pulse during each oscillation frequency; And
-carry out indicating (74) thus export chart to reflect the correlativity between described multiple oscillation frequency and described time delay, wherein, in at least one specific surge frequency range of described multiple oscillation frequency, each oscillation frequency corresponds to the change of described time delay, and, in at least one specific surge frequency range described, change corresponding oscillation frequency with described time delay maximum and be indicated as at least one resonant frequency described in described pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201080031564.1A CN102472661B (en) | 2009-07-16 | 2010-07-13 | A system and method for measuring a resonance frequency of a tube |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160418 | 2009-07-16 | ||
| CN200910160418.8 | 2009-07-16 | ||
| CN201080031564.1A CN102472661B (en) | 2009-07-16 | 2010-07-13 | A system and method for measuring a resonance frequency of a tube |
| PCT/IB2010/053190 WO2011007315A2 (en) | 2009-07-16 | 2010-07-13 | A system and method for measuring a resonance frequency of a tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102472661A CN102472661A (en) | 2012-05-23 |
| CN102472661B true CN102472661B (en) | 2014-12-24 |
Family
ID=43449915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080031564.1A Active CN102472661B (en) | 2009-07-16 | 2010-07-13 | A system and method for measuring a resonance frequency of a tube |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US9958316B2 (en) |
| EP (1) | EP2454568B1 (en) |
| JP (1) | JP5655072B2 (en) |
| CN (1) | CN102472661B (en) |
| BR (1) | BR112012000689B1 (en) |
| WO (1) | WO2011007315A2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10387621B2 (en) * | 2009-01-16 | 2019-08-20 | Cerner Innovation, Inc. | Matching of vibratory inhalers to patient vocal tract for optimization of particle dispersion |
| CN102606746B (en) * | 2012-01-11 | 2014-08-20 | 西北工业大学 | Method for sealing acoustic seal device |
| CN103405244A (en) * | 2013-08-02 | 2013-11-27 | 山东大学 | Whole-lung forced oscillation spectrum detection system |
| JP6782017B2 (en) * | 2017-11-07 | 2020-11-11 | 株式会社 アコースティックイノベーションズ | Respiratory audio equipment |
| AU2019260788B2 (en) * | 2018-04-27 | 2023-05-11 | Samay, Inc. | Systems, devices, and methods for performing active auscultation and detecting sonic energy measurements |
| CN109186747B (en) * | 2018-08-01 | 2020-12-01 | 歌尔光学科技有限公司 | Test system and test method |
| WO2021051107A1 (en) | 2019-09-13 | 2021-03-18 | California Institute Of Technology | Blood pressure measurement apparatus and methods of use thereof |
| WO2021154879A1 (en) * | 2020-01-28 | 2021-08-05 | California Institute Of Technology | Blood pressure measurement apparatus and methods of use thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194368A (en) * | 1997-03-21 | 1998-09-30 | 安德雷斯和霍瑟·弗罗泰克有限公司 | Measuring and controlling loop used in corioli type mass flow meter |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7005A (en) * | 1850-01-08 | Improvement in coating iron with copper or its alloy | ||
| BE759264A (en) * | 1969-11-25 | 1971-04-30 | Euratom | BODY RESONANCE FREQUENCY CONTROL DEVICE |
| JPS61235712A (en) | 1985-04-11 | 1986-10-21 | Kensaku Imaichi | Measuring method for internal diameter or the like of tube |
| US5241964A (en) * | 1990-10-31 | 1993-09-07 | Medwave, Incorporated | Noninvasive, non-occlusive method and apparatus which provides a continuous indication of arterial pressure and a beat-by-beat characterization of the arterial system |
| JPH0637574A (en) | 1992-07-20 | 1994-02-10 | Nec Corp | Surface acoustic wave oscillator and surface acoustic wave filter |
| US6168568B1 (en) * | 1996-10-04 | 2001-01-02 | Karmel Medical Acoustic Technologies Ltd. | Phonopneumograph system |
| AU3191499A (en) | 1998-03-30 | 1999-10-18 | Rush - Presbyterian - St. Luke's Medical Center | Method and apparatus for detection of air cavities in a body |
| US6383142B1 (en) | 1998-11-05 | 2002-05-07 | Karmel Medical Acoustic Technologies Ltd. | Sound velocity for lung diagnosis |
| US7708697B2 (en) * | 2000-04-20 | 2010-05-04 | Pulmosonix Pty Ltd | Method and apparatus for determining conditions of biological tissues |
| EP1276419A4 (en) | 2000-04-20 | 2009-01-07 | Univ Monash | Method and apparatus for determining conditions of biological tissues |
| US6443907B1 (en) | 2000-10-06 | 2002-09-03 | Biomedical Acoustic Research, Inc. | Acoustic detection of respiratory conditions |
| US6634233B2 (en) * | 2001-01-23 | 2003-10-21 | Wright State University | Method for determining the wall thickness and the speed of sound in a tube from reflected and transmitted ultrasound pulses |
| TW509782B (en) | 2001-11-20 | 2002-11-11 | Taiwan Forestry Res Inst | Nondestructive testing technique for wood stress wave |
| US20030220556A1 (en) * | 2002-05-20 | 2003-11-27 | Vespro Ltd. | Method, system and device for tissue characterization |
| US20070055151A1 (en) | 2005-01-20 | 2007-03-08 | Shertukde Hemchandra M | Apparatus and methods for acoustic diagnosis |
| US20070055175A1 (en) | 2005-05-25 | 2007-03-08 | Pulmosonix Pty Ltd | Devices and methods for tissue analysis |
-
2010
- 2010-07-13 CN CN201080031564.1A patent/CN102472661B/en active Active
- 2010-07-13 WO PCT/IB2010/053190 patent/WO2011007315A2/en active Application Filing
- 2010-07-13 EP EP10740750.4A patent/EP2454568B1/en active Active
- 2010-07-13 JP JP2012520142A patent/JP5655072B2/en active Active
- 2010-07-13 US US13/383,875 patent/US9958316B2/en active Active
- 2010-07-13 BR BR112012000689-4A patent/BR112012000689B1/en not_active IP Right Cessation
-
2018
- 2018-03-23 US US15/934,213 patent/US20180209840A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194368A (en) * | 1997-03-21 | 1998-09-30 | 安德雷斯和霍瑟·弗罗泰克有限公司 | Measuring and controlling loop used in corioli type mass flow meter |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平6-37574A 1994.02.10 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2454568A2 (en) | 2012-05-23 |
| US9958316B2 (en) | 2018-05-01 |
| JP5655072B2 (en) | 2015-01-14 |
| US20120116238A1 (en) | 2012-05-10 |
| BR112012000689A2 (en) | 2017-09-05 |
| EP2454568B1 (en) | 2013-09-11 |
| US20180209840A1 (en) | 2018-07-26 |
| BR112012000689A8 (en) | 2017-10-10 |
| WO2011007315A2 (en) | 2011-01-20 |
| WO2011007315A3 (en) | 2011-08-11 |
| CN102472661A (en) | 2012-05-23 |
| JP2012533332A (en) | 2012-12-27 |
| BR112012000689B1 (en) | 2019-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102472661B (en) | A system and method for measuring a resonance frequency of a tube | |
| JP6678118B2 (en) | Multi-sensor physiological monitoring system | |
| JP2017205513A (en) | Multimodal method and system for transmitting information about subject | |
| CN103957781A (en) | Medical product comprising a functional element for the invasive use in a patient's body | |
| CN103429167A (en) | System, method and device for automatic and autonomous determination of hemodynamic and cardiac parameters using ultrasound | |
| CN105682551A (en) | Device and method for monitoring bladder volume of a subject | |
| WO2006043528A1 (en) | Ultrasonographic device and ultrasonographic device control method | |
| JP2018520733A5 (en) | ||
| CN107708570B (en) | Monitoring system, method and device | |
| US20200367861A1 (en) | Patient monitoring | |
| US20230011489A1 (en) | System and method for diagnosing pulsatile tinnitus and other blood vessel disorders | |
| JP2015154884A (en) | Ultrasonic measurement apparatus and ultrasonic measurement method | |
| JP7341981B2 (en) | information selection device | |
| US9808164B2 (en) | Evaluation of cardiac dyssynchrony based on chest wall motion and electrical cardiac activity | |
| KR102527498B1 (en) | Method and apparatus for detecting obstruction in an vascular graft | |
| JP6399852B2 (en) | Pulse wave measuring device and biological information measuring device | |
| US11850039B2 (en) | Apparatus and method for determining a change in left ventricular twist of a subject's heart | |
| US20210048518A1 (en) | Method for measuring an ultrasonic attenuation parameter guided by harmonic elastography, probe and device for the implementation of the method | |
| US11872080B1 (en) | Multi-modal heart diagnostic system and method | |
| WO2014129203A1 (en) | Ultrasonic diagnostic device and method for controlling ultrasonic diagnostic device | |
| CN103687549B (en) | Ultrasonic detector, biological information measurement device and biological information measurement method | |
| US20150099988A1 (en) | Blood viscosity measuring method and system | |
| WO2014187708A1 (en) | Processing apparatus for processing optical shape sensing data values |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |